<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>天气案例-methods实现</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>今天天气很{{info}}</h2>
        <button @click="change">切换天气</button>
        <!--不写change函数的简单写法 @click=里面可以写一些简单语句-->
        <!-- <button @click="isHot = !isHot">切换天气</button> -->
    </div>
    <script>
        Vue.config.productionTip = false

        let vm = new Vue({
            el: "#root", 
            data:{
                isHot: true,
            },
            computed:{
                info(){
                    return this.isHot? '炎热':'凉爽'
                }
            },
            methods: {
                change(){
                    this.isHot = !this.isHot
                }
            },
        })

    </script>
</body>
</html>